agents.anac.y2010.Yushu
Class Utility

java.lang.Object
  agents.anac.y2010.Yushu.Utility

public class Utility
extends java.lang.Object

Constructor Summary

Utility()

Method Summary

static Action	chooseRandomBidAction(Agent agent) Wrapper for getRandomBid, for convenience.
static Bid	getRandomBid(UtilitySpace utilityspace)
static double	Paccept(double u, double t1) This function determines the accept probability for an offer.
static double	sq(double x)

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

Utility

public Utility()

Method Detail

chooseRandomBidAction

public static Action chooseRandomBidAction(Agent agent)

Wrapper for getRandomBid, for convenience.

Returns:

new Action(Bid(..)), with bid utility > MINIMUM_BID_UTIL. If a problem occurs, it returns an Accept() action.

getRandomBid

public static Bid getRandomBid(UtilitySpace utilityspace)
                        throws java.lang.Exception

Returns:

a random bid with high enough utility value.

Throws:

java.lang.Exception - if we can't compute the utility (eg no evaluators have been set) or when other evaluators than a DiscreteEvaluator are present in the util space.

Paccept

public static double Paccept(double u,
                             double t1)
                      throws java.lang.Exception

This function determines the accept probability for an offer. At t=0 it will prefer high-utility offers. As t gets closer to 1, it will accept lower utility offers with increasing probability. it will never accept offers with utility 0.

Parameters:

u - is the utility

t - is the time as fraction of the total available time (t=0 at start, and t=1 at end time)

Returns:

the probability of an accept at time t

Throws:

java.lang.Exception - if you use wrong values for u or t.

sq

public static double sq(double x)